The key to make homemade soap last longer is proper drainage. The one thing your homemade soaps should never do is sit in a pool of water. A soap dish that allows proper drainage – like this minimalist DIY wooden soap dish via How Did You Make This? – is an easy way to help ensure your soap drains properly and dries in between uses. (Re-pin this project here for later!)
Harder soaps also last longer than softer soaps. Therefore giving your homemade soaps a longer cure time can help your soap last longer as it inevitable results in a harder bar. You can also cut your homemade soaps in half so they are able to dry more quickly and thoroughly between uses.
Have a homemade soap that just doesn’t seem to get hard enough? Cure soft soap issues by changing your homemade soap recipes from the start. Using oils that create a harder bar from the get go will ensure a harder finished bar. There are many soapmaking ingredients that help to create a hard bar including shea and cocoa butters – or any butter for that matter – babassu oil, palm oil, palm kernel oil or flakes, lard (tallow), and coconut oil. (Using the soap calculator at soapcalc can help you determine the hardness of the final bar.)
Other ingredients like salt, stearic acid and sodium lactate – at around 1 teaspoon per pound of oils – will also result in a harder soap. You can also use a water discount to start out with a harder soap coming out of the mold. I always discount my water at 33% or slightly less for soaps I know tend to be softer when unmolding them.
For more inspiring soap ideas be sure to follow the Pinterest Makers Soapmaking Group Board as well as my DIY Bath and Body Pinterest Board! You can also find a collection of my own homemade soap recipes as well as bath and beauty DIY’s at my main website, Rebecca’s Soap Delicatessen.